Bone-conduction earphone



FIG. 1 is a front view of a bone-conduction earphone showing the new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a perspective view thereof; and,

FIG. 8 is another perspective view thereof.

The broken lines shown in the figures depict portions of the bone-conduction earphone that form no part of the claimed design. 

CLAIM The ornamental design for a bone-conduction earphone, as shown and described. 